Device for converting motion



(No Model.) r

' A. BOUOHARAT.

DEVICE FOR OONVERTING MOTION.

No. 563,444. Patented July 7, 18 96.

'i ulj INI:II

"UNITED STATES PATENT OFFICE.

AUGUSTE BOUCHARAT, OF eUsToN, COLORADO.

-DEVICE FOR CONVERTING MOTION.

SPECIFICATION forming partof Letters Iatent No. 563,444, dated July 7,1896.

Application filed October 6,1893.

To all whom it may concern.-

Be it known that I, AUGUSTE BOUCHARAT, a citizen of the United States,and a resident of Guston, in the county of Ouray and State of Colorado,have invented certain new and useful Improvements in Devices forConverting Motion, of which the following is a specification.

The object of my invention is to provide a device for converting motionand at the same time to increase the rate of speed with the leastexpenditure of force, and my invention is particularly adapted to beapplied to the driving of small boats and light vehicles, such astricycles and hand-cars, which can be operated by hand-power and myinvention consists of a longitudinally-fixed driving-shaft rotatedalternately to right and left by any suitable mechanism.

The driving-shaft communicates a reciprocating longitudinal motion to apair of abutting cylindrical screws'mounted thereon by causing one ofsaid cylinders to turn in a stationary nut fixed .to the motor-frame. Onthe adjacenteylinder ends, which are screwthreaded in oppositedirections, are mounted sliding nuts coupled to each other in such wisethat they increase the longitudinal motion of the second screw-threadedcylinder upon the driving-shaft. A third sliding nut mounted upon thesecond cylinder at its farther end is driven back and forth by both therotary and longitudinal motions of the latter, and is connected to ashaft or other suitable transmitting device to utilize the rapid andincreased reciprocating motion thus obtained.

In the accompanying drawings, which illustratemy invention, Figure 1 isa plan view of the motor with hand-lever attachment. Figs. 2 to 4,inclusive, are detail views of the device shown in Fig. 1; and Fig. 5shows a modification of the driving mechanism for rotating thedriving-shaft.

A is the motor-frame,up0n which is mounted the fixed rotatingdriving-shaft B. b is a beveled gear-wheel keyed to the endof thedriving-shaft B, and meshes wit-h any suitable driving mechanism adaptedto alternately rotate the shaft to right and left.

0 D are two screw threaded cylinders mounted upon and rotating with thedrivingshaft B and having a rectangular central hub Serial No. 487,348.(No model.)

or bearing E, which allows them to slide longitudinally thereon.

c and d c and d are respectively right and left handed screw-threads onthe cylindersurfaces 0 and D.

Secured to the motor-frame A is a fixed nut D, in which turns thescrew-threaded end d of the screw-cylinder D. Traveling nuts O O Dmounted on the ends cc d of the screwcylinders O D are each providedwith a groove F, which engages with and slides upon a guide G, securedto the motor-frameAparallel with the axis of the driving-shaft B.

H is a rigid link connecting the traveling nuts 0 D I is a shaft pivotedto the trunnions t' 1' ofthe traveling nut O.

The operation of this part of my invention is as follows: On turning thedriving-shaft B in the direction of the arrow, the cylinders O and Drotate with the shaft, and cylinder D is forced by the fixed nut D alongthe shaft away from the pinion b, pushing forward the cylinder O and thetraveling nuts D O 0. At the same time the rotation of the shaft Bdrives the traveling nut D toward the inner end of the screw-cylinder D,causing the traveling nut C on the cylinder 0 to move in the samedirection by means of the connectinglink H, and thus gives an additionalforward impulse to the cylinder 0, and with it to the traveling nut O.Simultaneously therewith the rotation of the cylinder C causes thecylinder to advance still in the same direction through the nut 0 Thecylinder O thus partakes of three movements in advance along the shaft,that imparted to it by the rotation of the cylinder D in the fixed nutD, that imparted to it by the sliding motion of the nut D on itsrotating screw D, and finally that caused by its own rotation within thenut 0 The cylinder 0 imparts this increased longitudinal motion in turnto the traveling nut O, mounted upon it, in addition to that motion ofthe nut 0 obtained by the revolution of the cylinder within it, a motionfinally transmitted by the nut O to the shaft 1. On reversing thedirection of rotation of the driving-shaft B, a similar action takesplace in the opposite direction on the shaft and the nut O is drivenwith equal rapidity and to the same distance in the contrary direction.

When it is desired to operate the motor by hand, I provide thefollowing'meohanism, (see Figs. 1 and 4,) in which J J are bevel-gears,loosely mounted upon the shaft K, and gearing each with the pinion h ofthe cylinder-.

driving shaft B. Grank connections L I and L Z unite the hubs of thebevel-gears J J, respectively, with the shafts m m of the up-' Adriving-wheel N, loosely.

The number M and its connections as will drive the screwthreaded end dof the screw-cylinder D its entire length through the fixed nut D. arehand and foot levers, alsoloosely mounted upon the shaftK, one on eachsideof the driv' in g-wheel N.

The levers are provided with;

the lugs P P, each terminating in a little roller p, which bears uponthe convex side of thei semicircular guides or bearil'igs Q and Q,secured to and projecting laterally from the two sides of thedriving-wheel N. The lugs P on the lever O, as well as their guides Qonone J side of the drivin gwheel N, are opposedto the lugs P on thelever-O and their 'guidesQ on the opposite side of the driving-wheel, sothat the lever 0 turns the driving-wheel to the right and the lever O tothe left.

The operation of this part of my invention is as follows: On working thelevers OOthe driving wheel N is alternately given a semirotation to leftand right. municates a complete rotation to the pinions This in turncom- M M, each in an opposite direction, and

through their crank connections to the beveled gears J J, turning thedriving-shaft B alternately to right and left and lastly imparting tothe connecting-shaft I the rapid and extended motion already described.

In Fig. 5 I have shown a modification of the driving mechanism forrotating the drivingshaft 1- in which a single bevel-gear J 2 is al-jternately turned to right and left by the crankshaft R and its rodconnection S. vide a simple and efficient mechanical device whichconverts reciprocating rotary motion I'thus prointo longitudinalreciprocating motion of extended stroke and increased rapidity, adaptedeylinder C as -W6ll as from the traveling nut C, or from.botl1, ifdesired,.and thatthe same may be done with one or all of the remainingreciprocating parts, the nuts 0 or D which have an identical movement,and the screwcylinder D.

It is also evident that I may omit the beveled gear J, its pinion M, andcrank connections L Z without interfering with the operation of myinvention; neither do I limit myself to the particular mechanism shownfor rotating-the driving-shaft, as it is immaterial by what means thisis done, provided it is alternately turned to right and left, so as totranslate and multiply the movement given it.

Having thus described my invei'ition, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination of the fixed rotatin g driving-shaft B, the right andleft handed screw-cyli nder D mounted thereon and adapted to slide uponand rotate with the shaft, the fixed nut D on one end of the cylinder,the

traveling nut D on the other-end of the cylinder, a guide parallel withthe axis of the driving-shaft, means on the nut D to engage with theguide and a devicefor rotating the driving-shaft, substantially asdescribed.

thedriving-shaft, substantially as described.

3. In a translating device having the driving-shaft B, thescrew-threaded cylinders O, B, the fixed nut D, the travclingnuts D C C,and the guide G engaging with said nuts, the combination of the shaft Imounted on the trunnions i i, on the nut C, the bevel-gear b keyed tothe head of the shaft B and suitable driving-gear meshing with thegear-wheel 19, substantially as described.

In testimony whereof I have hereunto signed this specification in thepresence of witnesses.

AUGUSTE BOUCHARAT.

lVitn esses:

THEO. PAULAIS, T. J. McKELvEY.

